Longitudinal water-permeable supporting block for tunnel

The invention discloses a longitudinal water-permeable supporting block for a tunnel. The supporting block comprises water-permeable filter cloth and a wedge-shaped structural body, the wedge-shaped structural body is of a water-permeable supporting structure, the wedge-shaped structural body is wrapped with the water-permeable filter cloth, the shape of the bottom face of the wedge-shaped structural body is matched with the surface of a longitudinal blind pipe of the tunnel, and the two side faces of the wedge-shaped structural body are matched with the shape of a space formed by a primary support and a waterproof plate. A high-strength supporting water-permeable wedge-shaped block replaces traditional loose non-fine concrete, is superior to non-fine concrete in drainage effect and supporting effect, has better field applicability, is convenient to transport and construct, can accelerate the project progress, is more economical and environment-friendly, and ensures the drainage effect of the longitudinal bli